There are 60 students in a speech contest. yesterday, 2/3 of them gave their speeches. today, 1/5 of the remaining students gave their speeches. how many students still haven't give their speeches?

16 students still have to give their speech

Step-by-step explanation:

Yesterday:

60 * 2/3 = 40

40 student gave speeches

that leaves 60-40 =20

20 students still have to give speeches

Today:

1/5 * 20 = 4

4 students gave speeches

20-4 = 16

16 students still have to give their speech

2 equivalent expressions to represent the area of a rectangle and the top is n-3 and the side is 2

area of the rectangle = length * width

given length = n - 3

width = 2

replace it in the area

so area of the rectangle = (n-3) *2

= 2(n-3)

one of the expression is 2(n-3)

to get another expression we distribute 2 inside the parenthesis

2(n-3) is 2n - 6

so another expression is 2n - 6

two equivalent expression are

2(n - 3)   , 2n - 6